Governor for steam-engines



(No Model.)

A. H. RAYNAL.

GOVERNOR EOE STEAM ENGINES. No. 450,917. Patented Apr. 21,1891.

mmm Nmmmmrn lllllllllll Il qui!" Illllllllllllllllll' UNITED STATESPATENT OFFICE.

ALFRED II. RAYNAL, OF RICHMOND, VIRGINIA.

GOVERNOR FOR STEAM-ENGINES.

S1?IECIFICA'IION forming part ofV Letters Patent No. 450,917, datedApril-21, 1891.

Application tiled January 6, 1890. Serial No. 336,021. (No model.)

T0 LM whom, it may concern:

Be it known that I, ALFRED ll. RAYNAL, of Richmond, in the county otHenrico and State of Virginia, have invented certain new and usefulImprovements in Governors for Steam Engines, of which the following is aspecification, reference being had to the accompanying drawings, and tothe letters of reference marked thereon.

Myinvention relates to that class of governors for steam-engines inwhich a shifting eccentric is employed, the movement of said eccentricbeing controlled by a weighted arm movable-by centrifugal force and acounterbalancing-spring.

My invention consists in the construction and arrangement of deviceshereinafter set forth in the specification and claim.

In the drawings, Figure l is a front view, partly in section; Fig. 2, asection through the line :c of Fig. l; and Figs. 3 and 4 are modifieddetails, partly in section.

Similar letters of reference indicate similar parts in the respectiveiigures.

A represents a casing or pulley fastened to the engine-shaft A.

B is a Weighted arm pivoted on the casing at b.

C is a spring, one end of which is secured to the casing at c and theother to the arm B at c', the spring tending to hold the weighted armtoward the center of the casing.

D is a camplatc rotating loosely around the shaft- A and connected bythe link (l to the weighted arm D.

E is the eccentric-plate, provided with an elongated opening c, throughwhich the shaft A passes. The plate E is pivoted to the casin g A at e',and provided at opposite points with pins c2, on which rollers c:srevolve. Instead of the rollers e3 blocks eL1 having a slio'htl :d 3 D2D curved face e, as shown 1n Fig. 3, may be The cam-surfaces d of theplateD enused.

gage the rollers e3 or the blocks et, as the case may be, and as thecam-plate D is turned on the shaft by either the action of the weightedarm B or that of the spring C the plate E will be shifted on the shaft Ain one of two directions.

The eccentric-plate E is provided with a grooved annulus F, whichreceives the eccentric-strap connecting with the rod leading, throughtheinterventiou of suitable parts, to the valve to be controlled.

Instead of using two rollers eg at opposite points on the plate E, I mayuse only one, as shown in Fig. et. In this case the cam-plate D isprovided with an inclined slot (l-corresponding with the camsurfaees d',in which the roller e3 plays. It is obvious that under thesecircumstances the cam-plate need be prolonged only in one direction fromthe shaft.

Having described my invention, I claim- In a governor forsteani-engines,a shaft and a pulley or casing secured thereon, a weighted arm movableby centrifugal force and pivoted on the casing, a eounterbalancingtensile spring tending to hold the weighted arm toward the center of thepulley or casin g, a camplatc loosely mounted on the shaft, and a linkconnecting the cam-plate and the weighted arm, combined with aneccentric-plate pivoted on the pulley or casing and having an elongatedopening through which the shaft passes, and provided at opposite pointswith pins and rollers adapted to revolve on said pin s and engage thecam-plate, all constructed, arranged, and operating substantially as setforth.

In testimony whereof I have hereunto set my hand and seal.

ALFRED II. RAYNAL.

